- Added caching for validation classes to reduce redundant computation.
- Ensured early exits if validation classes or errors are empty.
- Extended `Errors` delegators to include `empty?` for better usability.
- Updated `OptionsCollection` to cache validation classes for efficient reuse.
- Adjusted method lengths and checks for better readability and maintainability.

- Replaced separate caching logic with direct assignment to reduce complexity.
- Suppressed RuboCop warning for memoized instance variable naming.
- Enhanced readability and maintainability of the `validation_classes_from` method.